Biomedical subjects

A Kühberger

Publications and source records attributed to A Kühberger.

5 recordsLinked to original sources

PubMed1999

The Effects of Framing, Reflection, Probability, and Payoff on Risk Preference in Choice Tasks.

A meta-analysis of Asian-disease-like studies is presented to identify the factors which determine risk preference. First the confoundings between probability levels, payoffs, and framing conditions are clarified in a task analysis. Then the role of framing, reflection, probability, type, and size of payoff is evaluated in a meta-analysis. It is shown that bidirectional framing effects exist for gains and for losses. Presenting outcomes as gains tends to induce risk aversion, while presenting outcomes as losses tends to induce risk seeking. Risk preference is also shown to depend on the size of the payoffs, on the probability levels, and on the type of good at stake (money/property vs human lives). In general, higher payoffs lead to increasing risk aversion. Higher probabilities lead to increasing risk aversion for gains and to increasing risk seeking for losses. These findings are confirmed by a subsequent empirical test. Shortcomings of existing formal theories, such as prospect theory, cumulative prospect theory, venture theory, and Markowitz's utility theory, are identified. It is shown that it is not probabilities or payoffs, but the framing condition, which explains most variance. These findings are interpreted as showing that no linear combination of formally relevant predictors is sufficient to capture the essence of the framing phenomenon. Copyright 1999 Academic Press.

Journal Article↗

PubMed1998

The Influence of Framing on Risky Decisions: A Meta-analysis.

In framing studies, logically equivalent choice situations are differently described and the resulting preferences are studied. A meta-analysis of framing effects is presented for risky choice problems which are framed either as gains or as losses. This evaluates the finding that highlighting the positive aspects of formally identical problems does lead to risk aversion and that highlighting their equivalent negative aspects does lead to risk seeking. Based on a data pool of 136 empirical papers that reported framing experiments with nearly 30,000 participants, we calculated 230 effect sizes. Results show that the overall framing effect between conditions is of small to moderate size and that profound differences exist between research designs. Potentially relevant characteristics were coded for each study. The most important characteristics were whether framing is manipulated by changing reference points or by manipulating outcome salience, and response mode (choice vs. rating/judgment). Further important characteristics were whether options differ qualitatively or quantitatively in risk, whether there is one or multiple risky events, whether framing is manipulated by gain/loss or by task-responsive wording, whether dependent variables are measured between- or within- subjects, and problem domains. Sample (students vs. target populations) and unit of analysis (individual vs. group) was not influential. It is concluded that framing is a reliable phenomenon, but that outcome salience manipulations, which constitute a considerable amount of work, have to be distinguished from reference point manipulations and that procedural features of experimental settings have a considerable effect on effect sizes in framing experiments. Copyright 1998 Academic Press.

Journal Article↗

PubMed1996

["Pyromania" and arson. A psychiatric and criminologic data analysis].

We analyzed psychiatric and criminological data from 103 arsonists. The following criticisms of the definition of pyromania according to DSM-III-R and IDC-10 seem appropriate. First, the categoric exclusion of aggressive motives does not seem very promising, since approximately one fourth of arsonists whose firesetting is based on motives quoted in DSM-III-R may also have an aggressive motive. Second, ICD-10 gives being drunk and alcoholism as a criterion for the exclusion of pyromania. This seems untenable, since the behavior classed as pyromania is largely a product of alcohol misuse. Repeated firesetting, resulting from being fascinated by fire etc., may be less a disturbance of impulse control but rather the manifestation of a psychoinfantilism, which, supported by alcohol abuse, extends into older age. The mean age of such arsonists is slightly above 20 years. The tendency for relapses after imprisonment seems to be low; this tendency probably decreases spontaneously in older age. The mean age of arsonists with aggressive motives is a little below 30 years, those setting fire with suicidal motives have a mean age of 35, deluded arsonists have a mean age of 40 years. Concrete sexual motives are relatively rare. Approximately 50% of arsonists have a purely aggressive motive. Retaliation is a rare cause, however, since most of them do not even know the victims. One third of these persons set the fire in their own homes. Most arsonists show a personality disorder, with insecurity and narcissism predominating. Data on firesetting are to be treated with caution, since two thirds of all cases are newer resolved; one fourth of cases concern minors, and in Central Europe arsonists with rational motives are hardly ever referred to psychiatrists.

Adult↗

PubMed1995

[The role of alcohol in "pyromania" and arson].

The role played by alcohol in pyromania and arson was examined. We had a total of 103 arsonists, 95 of which were men and 8 women. 69 of the offenders had only started one fire, 34 had started more than one. 70 offenders were under the influence of alcohol at the time of the arson, 54 were alcoholics altogether. Adults were usually under the influence of alcohol, whereas adolescents were quite often not. Psychotics were generally not under the influence of alcohol. With regard to marital status, married arsonists showed the highest level of alcohol consumption. Offenders who started fires during the night were usually under the influence of alcohol, very drunk or even alcoholics. There were significant connections between the frequency and level of alcohol consumption and the number of previous convictions. Pyromania is classed as some form of psycho infantilism. In adults, it may be found in the form of an alcohol toxic regression in many different psychological disorders. However, it is found most commonly in unstable people with personality disorders.

Adolescent↗

PubMedDate not supplied

[Firesetting in attempted suicide].

In the course of 25 years we examined 103 arsonists psychiatrically. In 10 of these cases the firesetting was accompanied by a suicidal attempt, or was inspired by a suicidal motive. These arsonists differ from arsonists with other motives: typically suicidal arsonists are older, have a higher share of women, higher values of psychosocial burden, and different psychiatric diagnoses. Moreover, the fire ist set mainly in the own flat, revenge is seen much more frequently as an accompanying motive, and, typically, suicidally motivated arsonists do set only one single fire. Out of our 10 arsonists, 5 originally had intended to die in the flames but then ran away exasperated or were saved; this combination is termed "self-immolation" in older papers. We suggest the term "suicide in combination with firesetting" for cases, where, after having set a fire, the arsonist tries to commit suicide at a different place and with other means than fire. In 7 cases we found the motive of extended suicide, with taking along the own property; in 2 cases, along with the suicide, also intimates were intended to put to dead. One female arsonist was saved out of the fire and then, after being discharged from the hospital, tried to kill her unfaithful friend. About one half of the suicidally motivated firesetters was alcoholized at the time of their firesetting while 70% of the arsonists with other motives were alcoholized, 4 of the suicidal arsonists were alcoholics altogether, similar to the whole group of arsonists, from which, approximately, one half are alcoholics.

Adult↗